Honeywell CT3455 User Manual
21
69-0733—3
NOTE: All wiring must comply with local codes
and ordinances. If unsure about household
wiring procedures, call your local heating/air
conditioning contractor.
wiring procedures, call your local heating/air
conditioning contractor.
Refer to masking tape labels you placed on
wires when you removed your old thermostat.
wires when you removed your old thermostat.
■
■
Match the letter of your old thermostat wire
with the terminal of the corresponding letter on
your new thermostat. Refer to illustrations on
pages 22 and 23.
your new thermostat. Refer to illustrations on
pages 22 and 23.
In 5-wire installations only, be sure to re-
move the factory-installed jumper connect-
ing terminals R and Rc.
move the factory-installed jumper connect-
ing terminals R and Rc.
STEP 8
Wire Wallplate Terminals
INSTALLATION
22
69-0733—3
■
■
Loosen the terminal screws and slip each
wire beneath its matching terminal. Either
straight or wraparound wiring connections are
acceptable (see illustration). Tighten terminals.
straight or wraparound wiring connections are
acceptable (see illustration). Tighten terminals.
■
■
Plug the hole in the wall with insulation to
help prevent drafts from adversely affecting
thermostat operation.
thermostat operation.
M2486
FOR STRAIGHT INSERTION–
STRIP 5/16 IN. (8MM)
STRIP 5/16 IN. (8MM)
FOR WRAPAROUND–
STRIP 7/16 IN. (11MM)
STRIP 7/16 IN. (11MM)
M612A
THERMOSTAT
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
AND OVERLOAD PROTECTION AS REQUIRED.
1
2-WIRE HEAT-ONLY (JUMPER INTACT)
HEATING
RELAY OR
VALVE COIL
RELAY OR
VALVE COIL
W G
R RC
Y
M614A
THERMOSTAT
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
AND OVERLOAD PROTECTION AS REQUIRED.
1
4-WIRE HEAT/COOL (JUMPER INTACT)
HEATING
RELAY OR
VALVE COIL
RELAY OR
VALVE COIL
COOLING
CONTACTOR
COIL
CONTACTOR
COIL
FAN
RELAY
RELAY
W G
R RC
Y